Genghis Khan...psycho killer???

Despite his many brutal murders in life I somehow think Genghis Khan was a person and not a psycho violent killer. The part of the movie that convinced me that he thought about his actions was when he couldn't bear to kill his childhood friend Jamuka. I believe he was a person of honor and loyalty. When Jamuka's people turned him into Khan for their own survival, Genghis killed them because of their disloyalty and refused to kill Jamuka because of their old friendship. Even when Jamuka begged to be killed, Genghis refused to watch and showed he had some feelings about his actions. To be a psycho killer I think it requires that the person have no reasoning as to what is right and wrong, and I believe Genghis Khan knew what was right and what was wrong in this situation.